in the stands, their parents, jack and jackie harbaugh, will be sweating it out. >> that thrill of victory and the agony of defeat. and on sunday night, we're going to experience both of those -- those great emotions. and our thoughts will be with the one that comes up a little short. >> reporter: but they are also reveling in the thrill. jack harbaugh was a high school and college football coach himself. >> who has it better than us? nobody! >> reporter: they won't be wearing any team colors, and they won't say where they are sitting. their sons have coached against each other before, just not in the super bowl. last season, on thanksgiving day. the ravens won. >> during the three hours and fifteen minutes, i want you to know, this lady was comatose. >> because of the stress. something all parents of star athletes go through. this summer in london, ally went for gold but it was her parents' anxiety routine that went viral. >> stick it! >> reporter: adding to the stress, the harbaugh parents were the victims of a prank. an unidentified caller offend into a live press conference last week.